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Springs
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- Lifer
- Posts: 5277
- Joined: Wed Feb 19, 2014 3:01 pm
- Location: NW London
Springs
3.0si Sport: F10 Illuminated ZHP, Retrofit Cruise, OE Stubby, Gaptech RCH+, Kenwood BT73DAB + Handsfree, HIDs, LED Sidelights, OE LED Number Plate Lights, Custom LED strip bootlight.
- kis
- Lifer
- Posts: 4536
- Joined: Wed Jul 20, 2016 2:33 pm
- Location: Surrey / West Sussex Boarder
Springs
I think OP is pointing out that on one side he had a wrong spring fitted...
My E85 Z4 3.0i SMG
BMW Family History (past and present):
1 Series - E87
3 Series - E46 Coupe, E46 M3, E90 (x3)
4 Series - F36, F82 M4
5 Series - E34 (x2), E39
7 Series - E32
X5 - E53, E70
X6 - E71
BMW Family History (past and present):
1 Series - E87
3 Series - E46 Coupe, E46 M3, E90 (x3)
4 Series - F36, F82 M4
5 Series - E34 (x2), E39
7 Series - E32
X5 - E53, E70
X6 - E71
- kis
- Lifer
- Posts: 4536
- Joined: Wed Jul 20, 2016 2:33 pm
- Location: Surrey / West Sussex Boarder
Springs
M spring is a difference of 15mm I think. The other spring is just a standard spring. Not all Zed's came with M springs... both probably correct OEM sizes, just different setups. And obviously need to both be the same, so both either standard or both M
My E85 Z4 3.0i SMG
BMW Family History (past and present):
1 Series - E87
3 Series - E46 Coupe, E46 M3, E90 (x3)
4 Series - F36, F82 M4
5 Series - E34 (x2), E39
7 Series - E32
X5 - E53, E70
X6 - E71
BMW Family History (past and present):
1 Series - E87
3 Series - E46 Coupe, E46 M3, E90 (x3)
4 Series - F36, F82 M4
5 Series - E34 (x2), E39
7 Series - E32
X5 - E53, E70
X6 - E71
- kis
- Lifer
- Posts: 4536
- Joined: Wed Jul 20, 2016 2:33 pm
- Location: Surrey / West Sussex Boarder
Springs
If I were to do it again? Eibach and fit some spacers. Will give you whatever height you want... See this.
My E85 Z4 3.0i SMG
BMW Family History (past and present):
1 Series - E87
3 Series - E46 Coupe, E46 M3, E90 (x3)
4 Series - F36, F82 M4
5 Series - E34 (x2), E39
7 Series - E32
X5 - E53, E70
X6 - E71
BMW Family History (past and present):
1 Series - E87
3 Series - E46 Coupe, E46 M3, E90 (x3)
4 Series - F36, F82 M4
5 Series - E34 (x2), E39
7 Series - E32
X5 - E53, E70
X6 - E71
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- Member
- Posts: 155
- Joined: Mon May 23, 2016 2:46 pm
- Location: Pontypridd, S Wales
Springs
The shorter spring is the stiffer one, so it depends what's on the front, you need to balance it?
A spring is basically a steel rod wound into a coil, the longer the rod the more it flexes (is softer) for a given load, if you try to bend a 10mm steel rod that's 500m long it's extremely stiff, now bend one that's 2000mm long and its far more flexible, it's the same with a spring, the less coils (rod length) the stiffer it is for a given diameter of steel.
A spring is basically a steel rod wound into a coil, the longer the rod the more it flexes (is softer) for a given load, if you try to bend a 10mm steel rod that's 500m long it's extremely stiff, now bend one that's 2000mm long and its far more flexible, it's the same with a spring, the less coils (rod length) the stiffer it is for a given diameter of steel.
Rules are for the guidance of wise men and the blind obedience of fools - Colin Chapman
- Ewazix
- Lifer
- Posts: 4721
- Joined: Sun May 02, 2010 5:30 pm
- Location: Somerset
Springs
I was a bit mystified when I bought standard (non-spot) Sachs replacements for my std (non-sport) rears as the Sachs were a bit shorter. The OEM springs are dual rate with much thinner sections at each end, most aftermarkets are not but are slightly shorter and thicker off the car and not compressed. But once fitted and compressed they sit pretty much the same height.
I've found that the Sachs are slightly stiffer than the oem but not drastically. I suppose the aftermarkets are cheaper to make but a benefit is that they are less likely to snap as it's usually the thin'tails' that rust and break on the oem 'turkey twzizlers'
I've found that the Sachs are slightly stiffer than the oem but not drastically. I suppose the aftermarkets are cheaper to make but a benefit is that they are less likely to snap as it's usually the thin'tails' that rust and break on the oem 'turkey twzizlers'
2003 2.5 SE, low miles, Sterling Grey, 108's & Eagles, no stubby here! Unmolested.
2018 Cooper S Countryman
Fiesta Ecoboost
2018 Cooper S Countryman
Fiesta Ecoboost